Dual humidifier tank unit



FIG. 1 is a perspective view of the design for dual humidifier tank unitin accordance with the present invention;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof; the left side being amirror image of that shown;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a rear elevational view thereof.

The broken line showing of a a humidifier housing in FIGS. 1-6 is forillustrative purposes only and forms no part of the claimed design.

The ornamental design for a dual humidifier tank unit, as shown anddescribed.